Summary for Porrhomma errans (Araneae)

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National Distribution

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Porrhomma errans female Copyright: Richard Gallon
Identification difficulty rating: 4
Name: Porrhomma errans
Authority: (Blackwall, 1841)
Order: Arachnida: Araneae
Family: Linyphiidae
National Rarity status: NS
IUCN status: LC

Records: 103
First Record: 1850
Latest Record: 2020

1992-on hectads: 23
Pre-1992 hectads: 23
Total hectads: 46

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About this species

Recorded altitude range
10m to 260m

Species text

The species is widespread but very scattered with most recent records from the Midlands and south-eastern England. It is fairly widespread in north-western and central Europe, but not recorded from Scandinavia north of Denmark.

Habitat and ecology
The biology of this species is poorly known. It possibly occurs mainly on grassland, but it has also been found in woodland, on soft-rock cliffs, heavily rabbit-grazed grassland and arable land. In Essex it has been found on coastal landslips and south-facing grassland with a good proportion of bare ground and in Leicestershire it has been found in gardens, allotments and churchyards in grassland type habitats (J. Daws, pers. comm.). The presence of bare ground may be the most significant common feature. Adults of both sexes have been found between October and June, females also in August and September.

The species is apparently rare and local, with few specimens found. It is possibly under-recorded because its main habitat is unknown.

Given the apparently broad habitat range of this species, the reasons for its apparent decline are unclear.

Management and conservation
Clearly, further information on this species’ micro-habitat requirements and ecology is needed before detailed management recommendations can be formulated. An interim measure that could help its survival would be to ensure some bare ground is maintained in sites where it occurs.

Text based on Dawson, I.K., Harvey, P.R., Merrett, P. & Russell-Smith, A.R. (in prep.).  References

Adult Season

Adult Season Data (based on 21 records with adult season information)


background methodology

Broad Habitat Data (based on 41 records with habitat information)

Broad subhabitat Data (based on 1 records with subhabitat information)

Structural Habitat Data (based on 17 records with structural habitat information)

Habitat Detail and Method (based on 20 records with habitat detail and method information)

Recorded management for locations with Porrhomma errans

Recorded substrate and hydrology for locations with Porrhomma errans


Porrhomma errans female
Porrhomma errans female
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